University, Subject, Country, Region, World
Japan 979 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Jan 30, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (873.690) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Organic Electronics
OLED
Organic Semiconductors
Optoelectronics
Metrics
H-Index
i10 Index
Citation Counts
140
662
101,352
* Total H IndexRankings
Ranking Based On Selection: 2
Metrics
H-Index
i10 Index
Citation Counts
128
269
68,181
* Total H IndexRankings
Ranking Based On Selection: 3
Semiconductor devices
Opto electronics
Power devices
High frequency devices
photocathode
Metrics
H-Index
i10 Index
Citation Counts
110
807
61,769
* Total H IndexRankings
Ranking Based On Selection: 4
Electrical Engineering
Metrics
H-Index
i10 Index
Citation Counts
108
320
68,244
* Total H IndexRankings
Ranking Based On Selection: 5
Photonic crystal
Photonic Crystal Lasers
Semiconductor Lasers
Nanocavity
photonic crystals
Metrics
H-Index
i10 Index
Citation Counts
90
391
39,111
* Total H IndexRankings
Ranking Based On Selection: 6
Artificial Intelligence
Robotics
Computer Vision
Computer Graphics
Metrics
H-Index
i10 Index
Citation Counts
89
385
30,608
* Total H IndexRankings
Ranking Based On Selection: 7
organic semiconductor
Metrics
H-Index
i10 Index
Citation Counts
88
329
30,036
* Total H IndexRankings
Ranking Based On Selection: 8
Smart Grid
Power System
Renewable Energy
Power Electronics
Energy Storage.
Metrics
H-Index
i10 Index
Citation Counts
78
529
29,828
* Total H IndexRankings
Ranking Based On Selection: 9
Solvothermal
Sensor
Photocatalyst
Smart Windows
2D Materials
Metrics
H-Index
i10 Index
Citation Counts
75
334
19,722
* Total H IndexRankings
Ranking Based On Selection: 10
Thermal management
Thermoelectric materials
Oxides
Thin Films
Materials Science
Metrics
H-Index
i10 Index
Citation Counts
74
215
56,374
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* Total H IndexRankings
Ranking Based On Selection: 11
Nanoelectronics
Thin film electronics
graphene
fullerene
Metrics
H-Index
i10 Index
Citation Counts
74
276
18,881
* Total H IndexRankings
Ranking Based On Selection: 12
Signal transduction
Cancer Biology
Osteoclastogenesis
Metrics
H-Index
i10 Index
Citation Counts
73
159
29,175
* Total H IndexRankings
Ranking Based On Selection: 13
Semiconductors for energy conversion
Carrier dynamics
Metrics
H-Index
i10 Index
Citation Counts
71
187
28,380
* Total H IndexRankings
Ranking Based On Selection: 14
Fiber Optics
Optical Communications
Metrics
H-Index
i10 Index
Citation Counts
70
240
19,089
* Total H IndexRankings
Ranking Based On Selection: 15
Millimeterwave and Terahertz Photonics
Metrics
H-Index
i10 Index
Citation Counts
68
289
22,797
* Total H IndexRankings
Ranking Based On Selection: 16
Material science
Nanomaterial
Nanophotonics
Metrics
H-Index
i10 Index
Citation Counts
67
281
17,252
* Total H IndexRankings
Ranking Based On Selection: 17
nanoscience
plasmonics
nanophotonics
Metrics
H-Index
i10 Index
Citation Counts
67
219
15,325
* Total H IndexRankings
Ranking Based On Selection: 18
Control
robotics
Metrics
H-Index
i10 Index
Citation Counts
66
271
15,411
* Total H IndexRankings
Ranking Based On Selection: 19
Energy Nano-Materials
Nano Photonics
Surface Physics
Infrared Nano Science
Metrics
H-Index
i10 Index
Citation Counts
64
205
14,918
* Total H IndexRankings
Ranking Based On Selection: 20
Electronic systems
Metrics
H-Index
i10 Index
Citation Counts
63
152
31,026
* Total H IndexRankings
Ranking Based On Selection: 21
electric machine magnetic suspension
Metrics
H-Index
i10 Index
Citation Counts
62
277
15,851
* Total H IndexRankings
Ranking Based On Selection: 22
Terahertz electronics
Graphene plasmonics
Metrics
H-Index
i10 Index
Citation Counts
61
242
13,735
* Total H IndexRankings
Ranking Based On Selection: 23
Microfluidics
Metrics
H-Index
i10 Index
Citation Counts
57
176
9,872
* Total H IndexRankings
Ranking Based On Selection: 24
Control Engineering
Compulational Intelligence
Active disturbance rejection
Process control
Rehabilitation robotics
Metrics
H-Index
i10 Index
Citation Counts
57
244
17,862
* Total H IndexRankings
Ranking Based On Selection: 25
Materials Science
Crystal Growth
Microgravity
Nanomaterials
Energy applications
Metrics
H-Index
i10 Index
Citation Counts
56
270
11,993
Chihaya Adachi
Kyushu University
Fukuoka, Japan
Metrics
H-Index
i10-Index
Citation Counts
140
662
101,352
Organic Electronics
OLED
Organic Semiconductors
Optoelectronics
Hideya Iwasaki
Metrics
H-Index
i10-Index
Citation Counts
128
269
68,181
Hiroshi Amano 天野 浩
Nagoya University
Nagoya, Japan
Metrics
H-Index
i10-Index
Citation Counts
110
807
61,769
Semiconductor devices
Opto electronics
Power devices
High frequency devices
photocathode
Photonic crystal
Photonic Crystal Lasers
Semiconductor Lasers
Nanocavity
photonic crystals
Katsushi Ikeuchi
University of Tokyo
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
89
385
30,608
Artificial Intelligence
Robotics
Computer Vision
Computer Graphics
Kazuo Takimiya
Tohoku University
Sendai, Japan
Metrics
H-Index
i10-Index
Citation Counts
88
329
30,036
organic semiconductor
Tomonobu Senjyu
University of Ryukyus
Sendai, Japan
Metrics
H-Index
i10-Index
Citation Counts
78
529
29,828
Smart Grid
Power System
Renewable Energy
Power Electronics
Energy Storage.
Solvothermal
Sensor
Photocatalyst
Smart Windows
2D Materials
Hiromichi Ohta
Hokkaido University
Sapporo, Japan
Metrics
H-Index
i10-Index
Citation Counts
74
215
56,374
Thermal management
Thermoelectric materials
Oxides
Thin Films
Materials Science
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Kazuhito Tsukagoshi
Metrics
H-Index
i10-Index
Citation Counts
74
276
18,881
Nanoelectronics
Thin film electronics
graphene
fullerene
Jun Ichiro Inoue
University of Tokyo
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
73
159
29,175
Signal transduction
Cancer Biology
Osteoclastogenesis
Takashi Hisatomi
Shinshu University
Matsumoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
71
187
28,380
Semiconductors for energy conversion
Carrier dynamics
Kunimasa Saitoh
Hokkaido University
Sapporo, Japan
Metrics
H-Index
i10-Index
Citation Counts
70
240
19,089
Fiber Optics
Optical Communications
Tadao Nagatsuma
Osaka University
Suita, Japan
Metrics
H-Index
i10-Index
Citation Counts
68
289
22,797
Millimeterwave and Terahertz Photonics
Minoru Fujii （藤井 稔）|M. Fujii, Fujii, M
Kobe University
Kobe, Japan
Metrics
H-Index
i10-Index
Citation Counts
67
281
17,252
Material science
Nanomaterial
Nanophotonics
nanoscience
plasmonics
nanophotonics
Akira Shimada
Metrics
H-Index
i10-Index
Citation Counts
66
271
15,411
Tadaaki Nagao
Metrics
H-Index
i10-Index
Citation Counts
64
205
14,918
Energy Nano-Materials
Nano Photonics
Surface Physics
Infrared Nano Science
Tsuyoshi Sekitani
Osaka University
Suita, Japan
Metrics
H-Index
i10-Index
Citation Counts
63
152
31,026
Chiba Akira
Metrics
H-Index
i10-Index
Citation Counts
62
277
15,851
electric machine magnetic suspension
Taiichi Otsuji
Tohoku University
Sendai, Japan
Metrics
H-Index
i10-Index
Citation Counts
61
242
13,735
Terahertz electronics
Graphene plasmonics
Shinichi Ookawara
Metrics
H-Index
i10-Index
Citation Counts
57
176
9,872
Jinhua She
Tokyo University of Technology
Hachioji, Japan
Metrics
H-Index
i10-Index
Citation Counts
57
244
17,862
Control Engineering
Compulational Intelligence
Active disturbance rejection
Process control
Rehabilitation robotics
Yasuhiro Hayakawa
Shizuoka University
Shizuoka, Japan
Metrics
H-Index
i10-Index
Citation Counts
56
270
11,993
Materials Science
Crystal Growth
Microgravity
Nanomaterials
Energy applications